The summer after Andi Carter turns nine the circus comes to town. She can't wait to get in line to see the elephants, acrobats, and--most of all--the champion bareback rider. What could be more thrilling than riding your very own horse under the big top? When the Carters see the show, Andi meets Henry Jackson, a small boy selling concessions. Andi thinks his job must be perfect, hanging out with happy clowns, exotic animals, and excited visitors...